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Grade 11Algebra

Solve for x
1 – 2.5 x = exp(-0.5x)
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Question image for Solve for x 1 – 2.5 x = exp(-0.5x) …............

pra

7 Years agoGrade 11

3 Answers

Aditya Gupta

Approved Tutor Answer7 Years ago

obviously the given answer x=3.14 is wrong bcoz the LHS would be negative at this value while RHS would be positive.

put y= – x/2

so given eqn becomes

1+5y= e^y

draw graphs of z=e^y and z= 1+5y. and note their intersections.

obviously they intersect at y=0 or x=0.

further, there shall be one more solution of y=2.66 or x= – 5.32

kindly approve :)

pra

7 Years ago

I think for equation,

1 – 0.25 x = exp(-0.5x)

x = 3.14

pra

7 Years ago

Plz draw the graph for 1 – 0.25 x = exp(-0.5x).

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