...... .{ b ...................; if x = 0

What value of b makes f continuous at x = 0?

so.. the left side and right side must be equal in order to make

f continuous at x = 0

[(e^x) - 1] / x = b

[(e^x) - 1] = (b)(x)

e^x = (b)(x) + 1

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dont know how to proceed..

should i introduce ln?