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harshitpuri
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This question relies on knowing a power rule:
$$\left(b^n\right)^m=b^{n\cdot m}$$
Plugging in x^x for x gives
$$\left(x^x\right)^{x^x}$$
Applying the power rule gives
$$x^{x\cdot x^x}$$
Which simplifies to
$$x^{x^{x+1}}$$
$$\left(b^n\right)^m=b^{n\cdot m}$$
Plugging in x^x for x gives
$$\left(x^x\right)^{x^x}$$
Applying the power rule gives
$$x^{x\cdot x^x}$$
Which simplifies to
$$x^{x^{x+1}}$$
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