MCQ
For every value of x, the function f(x) = `1/7^x` is ______
- ANeither increasing nor decreasing
- BIncreasing
- CIncreasing for x > 0 and decreasing for x < 0
- ✓Decreasing
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| Column $- I$ | Column $- II$ | ||
| $(a)$ | Gluconic acid | $(i)$ | Trichoderma koenigii |
| $(b)$ | Vitamin $B_{12}$ | $(ii)$ | Streptomyces erythreus |
| $(c)$ | Erythromycin | $(iii)$ | Pseudomonas denitrificans |
| $(d)$ | Cellulase | $(iv)$ | Aspergillus niger |