Get premium membership and access questions with answers, video lessons as well as revision papers.
a)f(x)=x³+6
y=x³+6
Making x the subject,
X³=y-6 ;
X=³v(y-6)
f'(x)=³v(x-6) ;replace y with x.
b)f(x)=4v(9-11x)
y=4v(9-11x)
y4=9-11x
11x=y4-9
x=¹/11(y4-9)
f'(x)=¹/11(x4-9) repeat the same procedure as in (a)
Henry97 answered the question on November 10, 2017 at 20:41
- If A={2,5,8} and B={0,2,6,9}, then AUB will be?(Solved)
If A={2,5,8} and B={0,2,6,9}, then AUB will be?
Date posted: November 10, 2017. Answers (1)
- Estimate the time which the lorry travelling at 89.67km/h will take to cover a distance of 4497 km(Solved)
Estimate the time which the lorry travelling at 89.67km/h will take to cover a distance of 4497 km
Date posted: November 10, 2017. Answers (1)
- A vehicle travelled for 4(1/2)hours and covered a distance of 844 km. estimate the speed of the vehicle.(Solved)
A vehicle travelled for 4(1/2)hours and covered a distance of 844 km. estimate the speed of the vehicle.
Date posted: November 10, 2017. Answers (1)
- Truncate the following numbers to the accuracy given in brackets:
a. 807.376 (2 d.p.)
b. 3.462 (2 s.f.)
c. 57.605 (1 d.p.)
(Solved)
Truncate the following numbers to the accuracy given in brackets:
a. 807.376 (2 d.p.)
b. 3.462 (2 s.f.)
c. 57.605 (1 d.p.)
Date posted: November 10, 2017. Answers (1)
- Round off the following to the nearest
a. Tenths
b. Hundredths
c. Thousandths
i. 68.246
ii. 1.2678
iii. 0.04791
(Solved)
Round off the following to the nearest
a. Tenths
b. Hundredths
c. Thousandths
i. 68.246
ii. 1.2678
iii. 0.04791
Date posted: November 10, 2017. Answers (1)
- Round of to the following to the nearest
a. Thousands
b. Hundreds
c. Tens
i 89546
ii 75342
iii 13177
(Solved)
Round of to the following to the nearest
a. Thousands
b. Hundreds
c. Tens
i 89546
ii 75342
iii 13177
Date posted: November 10, 2017. Answers (1)
- Estimate the answer to (162 x 279)/42(Solved)
Estimate the answer to (162 x 279)/42
Date posted: November 10, 2017. Answers (1)
- Truncate 661.7 to
a. 3 significant figures
b. 2 significant figures
(Solved)
Truncate 661.7 to
a. 3 significant figures
b. 2 significant figures
Date posted: November 10, 2017. Answers (1)
- Truncate 4.246 to 2 decimal places.(Solved)
Truncate 4.246 to 2 decimal places.
Date posted: November 10, 2017. Answers (1)
- What is truncation?(Solved)
What is truncation?
Date posted: November 10, 2017. Answers (1)
- Round off 495.194 to:
a. The nearest hundreds
b. Four significant figures
c. The nearest whole number
d. Two decimal places
(Solved)
Round off 495.194 to:
a. The nearest hundreds
b. Four significant figures
c. The nearest whole number
d. Two decimal places
Date posted: November 10, 2017. Answers (1)
- Determine the population of a town four years ago if the present population is 800 000 and the annual population growth rate of the town...(Solved)
Determine the population of a town four years ago if the present population is 800 000 and the annual population growth rate of the town is 5%.
Date posted: November 7, 2017. Answers (1)
- A school bursar wishes to obtain the sum of the following amounts of money paid in as school fees for three students by the CDF:...(Solved)
A school bursar wishes to obtain the sum of the following amounts of money paid in as school fees for three students by the CDF: Ksh 10860, Ksh 49105 and Ksh 7352, the bursar estimates the sum by first rounding each of the amounts to 3 significant figures.
(a) Determine the estimated sum
(b) Determine the percentage error in this estimate
Date posted: November 7, 2017. Answers (1)
- A solid metal cuboid 1.5 m long, 0.4 m wide and 0.25 m high of material of density 7.5g/cm3. Calculate it's mass in Kilograms. ...(Solved)
A solid metal cuboid 1.5 m long, 0.4 m wide and 0.25 m high of material of density 7.5g/cm3. Calculate it's mass in Kilograms.
Date posted: November 7, 2017. Answers (1)
- The marked price of a modern camera is Kes 24, 000. A trader sold it to a customer at a 10% discount. If the trader...(Solved)
The marked price of a modern camera is Kes 24, 000. A trader sold it to a customer at a 10% discount. If the trader still made a profit of 20% on the cost price, what was its cost price?
Date posted: November 6, 2017. Answers (1)
- A rectangular water tank has a base measuring 4m by 2.5m. This tank has water to a height of 90cm. Water is then pumped into...(Solved)
A rectangular water tank has a base measuring 4m by 2.5m. This tank has water to a height of 90cm. Water is then pumped into this tank continuously from 2240 hours to 2330 hours at the rate of 1.2 litres per second. Find the new depth of water in the tank after this period of time giving your results in metres.
Date posted: November 6, 2017. Answers (1)
- The total enrollment in Soma primary school was 1500 pupils last year. The enrollment this year is 120% of last year’s enrollment?(Solved)
The total enrollment in Soma primary school was 1500 pupils last year. The enrollment this year is 120% of last year’s enrollment?
Date posted: October 27, 2017. Answers (1)
- The price of an article was raised by 10% and a week later the new price was lowered by 5%. What was the new price...(Solved)
The price of an article was raised by 10% and a week later the new price was lowered by 5%. What was the new price if the original price was sh. 100?
Date posted: October 27, 2017. Answers (1)
- A rectangle measure 20 cm by 15 cm.
a. If each dimension is reduced by 5 cm, by what percentage is
i. The perimeter and
ii. The area of the...(Solved)
A rectangle measure 20 cm by 15 cm.
a. If each dimension is reduced by 5 cm, by what percentage is
i. The perimeter and
ii. The area of the rectangle reduced?
b. If each dimension is reduced by 4%. what percentage is
i. The perimeter and
ii. The area of the rectangle reduced?
Date posted: October 27, 2017. Answers (1)
- An insurance company reduced its annual premium for a policy by 12.5% to sh. 750. What was the previous amount of premium?(Solved)
An insurance company reduced its annual premium for a policy by 12.5% to sh. 750. What was the previous amount of premium?
Date posted: October 27, 2017. Answers (1)