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This is a Test of Mathematics Solution Objective 699 (from ISI Entrance). The book, Test of Mathematics at 10+2 Level is Published by East West Press. This problem book is indispensable for the preparation of I.S.I. B.Stat and B.Math Entrance.

Also visit: I.S.I. & C.M.I. Entrance Course of Cheenta

Problem

Graphing an exponential function can be tricky. We are familiar with the graph of $$e^x$$. But what if a bunch of such exponential expressions is clubbed together? I.S.I.’s Test of Mathematics has a problem related to this.

The adjoining figure is the graph of

(A) $$y = 2 e^x$$

(B) $$y = 2^{-x}$$

(C) $$y = e^x + e^{-x}$$

(D) $$y = e^x – e^{-x} + 2$$

Part 2 and 3