(b) y " 4g 't 4g t " ' y +4g +4g y " e- = , gcx) = - y = In ✗ ' r -140+4=0 → -2 e- = ↳ e- " =/ ✗ zézx ✗ yµ= → e- , ↳ + ✗ zrxé " e- e- 2x - ↳ zxézx / = e- "✗ -2✗t2✗e= e- "✗ thx Éx21n✗ = - ftzid '¥dx + f×en×_ = . dx -1-2×2 lnxttyx = fxlnxdx - s=k× , dt=✗d✗ ds=¥d✗ + c = lnx w - X + - f * Uzyz ¥d✗ y : = ✗ > 0 : y = C, e- Flux = f- { - ↳ ✗ Zlnx É X'e- + - ↳ ✗ 'z✗2 = di ✗ tcz +1-4×2 + c.) elnx + * + (✗ lnx ÷, He-2×+4 e- -2×+1-2×2e- czxe = , e-Y.GE?MH-dx=feT#I-i--dx--flnxdx,anezaxdw-- Int 1- - N MY , for , -2 = ↳ = i. r e- 2×-2×-2-1 yj= - 0 ✗ > , f×éY¥"1n _d✗ - = / = ⇐ yi → e- = = Uz - " WH " " " , O - → ✗ e- yz= u e- = " lnx - " - ✗ 1- + 3-4×2e- ⇐ G) ✗ e- ↳ -2×1 nx ✗ Ze - ✗E- * + czié "